Hydraulic pump



FIG. 1 is a front-left-top perspective view of a hydraulic pump, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a front view thereof.

The broken lines in the drawings depict portions of the hydraulic pump that form no part of the claimed design. 

CLAIM The ornamental design for a hydraulic pump, as shown and described. 